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Re: [AVR-Chat] soil moisture sensor

2007-10-18 by Thomas Keller

Basicly, the resistance of soil is based on moisture content, because it 
is the moisture
that provides the conductivity from particle to particle, not the 
mineral or other
dry content of the soil.


avrFreak

Ralph Hilton wrote:
>
> On Thu, 18 Oct 2007 12:27:59 -0500 you (Thomas Keller 
> <tjkeller1@alltel.net <mailto:tjkeller1%40alltel.net>>)
> wrote:
>
> I was wondering how a simple resistance measurement could 
> differentiate between
> a moist soil with low nutrient content and a drier soil containing a 
> lot of
> soluble nutrients.
>

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